CN201837261U - Special device for power generation by using high-temperature high-dust-content flue gas waste heat in metallurgical furnace - Google Patents
Special device for power generation by using high-temperature high-dust-content flue gas waste heat in metallurgical furnace Download PDFInfo
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- CN201837261U CN201837261U CN2010205633385U CN201020563338U CN201837261U CN 201837261 U CN201837261 U CN 201837261U CN 2010205633385 U CN2010205633385 U CN 2010205633385U CN 201020563338 U CN201020563338 U CN 201020563338U CN 201837261 U CN201837261 U CN 201837261U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The utility model discloses a special device for power generation by using high-temperature high-dust-content flue gas waste heat in a metallurgical furnace, comprising a metallurgical furnace, a draught fan and an exhaust funnel which are connected in sequence by pipelines. The special device is characterized in that a high-temperature dust collector and a heat exchanger are connected between the metallurgical furnace and the draught fan in sequence by pipelines; the high-temperature dust-collector is internally provided with a silicon carbide filter element ; the heat exchanger is internally provided with a fin-type evaporator; one end of the fin-type evaporator is connected with a working medium circulating pump, the other end is connected with a turbine; one end of the turbine is connected with an aluminum rib plate type condenser, the other end is connected with a generator; one end of the aluminum rib plate type condenser is connected with the working medium circulating pump, the other end is connected with a water pump; the outlet of the aluminum rib plate type condenser is connected with a cooling tower which is connected with the water pump. The special device is further characterized in that n-pentane is adopted as circulating organic working medium. The special device can furthest recover thermal energy in the flue gas, and converts the thermal energy into electric energy; ash-discharging, ash-removing or ash-transporting facilities are not required by the heat exchanger, the service life of equipment is prolonged, and the environmental-protection effect is good.
Description
Affiliated technical field
The utility model belongs to metallurgical furnace dedusting cogeneration field, relates to the dedusting and the cogeneration of metallurgical furnace flue gas.
Background technology
Metallurgical furnace (electric furnace, converter, rotary hearth furnace) steel-making flue-gas temperature is very high, and generally about 800 ℃, dust concentration reaches 25g/Nm to the temperature that enters pipeline after capturing
3, accounting for more than 70% of dust total amount less than the ash of 10um, Dust Capacity is big, and sticking and thin.Usually adopt the method for first heat exchange cooling (the heat exchange cooling method has: mechanical cooler heat exchange, spraying cooling heat transferring, residual heat boiler for exchanging heat etc.) back dedusting at present.There are many shortcomings in the method for elder generation's heat exchange cooling back dedusting:
1, dedusting after the mechanical cooler heat exchange: cooling-down effect is poor, and input gas temperature should not be greater than 500 ℃, and cooling is limited in scope, and the stifled easily ash of machine cooler tube wall causes the burning cloth bag, and system can't normally move.
2, dedusting behind the spraying cooling heat transferring: increase the content of water in the flue gas, cloth bag is hardened, also cause water and dust bonding easily, cause system equipment to stop up.
3, dedusting after the residual heat boiler for exchanging heat: owing to contain a large amount of dust in the flue gas, even sticking and thin dust also dust stratification, clogging can occur on the heat-pipe elements of light pipe, heat-pipe elements dust stratification, obstruction for the hoop finned tube are more serious, simultaneously in order to prevent the knot ash, heat exchange core parts spacing of fin is big in the UTILIZATION OF VESIDUAL HEAT IN facility, not only influence heat exchange efficiency, cause waste heat boiler steam production deficiency, even more serious is because the stifled ash of waste heat boiler, system's fluctuation of service, cause to smelt to produce and normally to carry out the maintenance of being forced to stop production.
Because above shortcoming, adopt many ash-blowing methods in the engineering: as shock-wave ash blowing, steam soot blowing, ball deashing etc. falls, but owing to dust carefully glues, and Dust Capacity is big, 1 ton of steel of every production will produce the 30kg dust, these purge modes produce little effect, and can't fundamentally solve dust stratification, blockage problem.
Summary of the invention
The purpose of this utility model provides a kind of metallurgical furnace flue gas dedusting cogeneration isolated plant.The heat energy that this isolated plant can not only reclaim in the flue gas to greatest extent is converted into the high-grade electric energy, drag dedusting fan, can reduce simultaneously the exhaust temperature of flue gas, improve dust collection capacity, and do not influence the stable and continuous of electric furnace steel making production, can also obtain good dust removing effects, the dust concentration of discharging is less than 10mg/Nm
3
The technical scheme that the utility model adopted is as follows: the high ash-laden gas cogeneration of metallurgical furnace high temperature isolated plant, comprise the metallurgical furnace that connects successively by pipeline, air-introduced machine, aiutage, it is characterized in that: be connected with hot precipitator in turn by pipeline between described metallurgical furnace and the air-introduced machine, heat exchanger, be provided with the carborundum filter core in the described hot precipitator, in the described heat exchanger finned evaporator is installed, the entrance point of finned evaporator is connected with the high-pressure outlet end of working medium circulating pump, the port of export of finned evaporator is connected with the upper flange interface of steam turbine behind pipeline, the bottom interface of low boiling working fluid steam turbine is connected by the air inlet of pipeline with aluminium fin-plate type condenser, the liquid phase outlet of aluminium fin-plate type condenser is connected with the low pressure inlet end of working medium circulating pump by pipeline, the low boiling working fluid steam turbine is connected with threephase generator, an end flange interface of aluminium fin-plate type condenser is connected with water pump, another end of aluminium fin-plate type condenser connects cooling tower, cooling tower is connected with water pump, constitutes a loop.
It is further characterized in that: adopting pentane is the circulation organic working medium.
The utility model beneficial effect is: because after the utility model device for generating power by waste heat was placed on hot precipitator, the thermal source dust content was low, and therefore can the design of the heat exchange core cell spacing of fin in the heat exchanger is very little; And need not unload ash, deashing, defeated grey facility; Volume reduces, and maintenance reduces simultaneously, has also prolonged the service life of heat exchanger, and dust emission concentration is lower.Compared with prior art, the utlity model has following advantage, economic effect:
1. the heat energy that reclaims to greatest extent in the flue gas is converted into the high-grade electric energy, is used for producing.
2. satisfy the requirement of recycling economy, meet the national policy of energy-saving and emission-reduction.
3. heat exchanger dust stratification does not stop up, and heat exchange efficiency improves 8～9 times.
4. save the soot blower system of heat exchanger, thereby reduced cost and operating cost.
5. adopt high temperature resistant carborundum filter-element dust collector, concentration of emission≤10mg/Nm
3
6. applied range, metallurgical furnace dedusting cogeneration all can be adopted.
In sum, this programme adopts the device of cogeneration after the first dedusting, and smoke dust discharge concentration is low, and generated energy is many, and it is low to install stable energy consumption.
Description of drawings
Fig. 1 is an apparatus structure schematic diagram of the present utility model.
1. metallurgical furnaces among the figure, 2. four hole water-cooled sliding sleeve, 3. combustion settling chambers, 4. hot precipitator, 5. heat exchanger, 6. blower fan, 7. aiutage, 8. finned evaporator, 9. low boiling working fluid steam turbine, 10. threephase generator, 11. working medium circulating pump, 12. water pump, 13. aluminium fin-plate type condensers, 14. cooling towers.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Metallurgical furnace flue gas cogeneration special equipment comprises combustion settling chamber 3 in the utility model, hot precipitator 4, heat exchanger 5, main air blower 6, aiutage 7, described combustion settling chamber is by the pipeline hot precipitator 4 that is linked in sequence, heat exchanger 5, main air blower 6, aiutage 7, be provided with the carborundum filter core in the described hot precipitator 4, in the described heat exchanger 5 finned evaporator 8 is installed, the entrance point of finned evaporator 8 is connected with the high-pressure outlet end of working medium circulating pump 11, the port of export of finned evaporator 8 is connected with the upper flange interface of low boiling working fluid steam turbine 9 behind pipeline, the bottom interface of low boiling working fluid steam turbine 9 is connected by the air inlet of pipeline with aluminium fin-plate type condenser 13, the liquid phase outlet of aluminium fin-plate type condenser 13 is connected with the low pressure inlet end of working medium circulating pump 11 by pipeline, low boiling working fluid steam turbine 9 is connected with threephase generator 10, an end flange interface of aluminium fin-plate type condenser 13 is connected with water pump 12, another end of aluminium fin-plate type condenser 13 connects cooling tower 14, cooling tower 14 is connected with water pump 12, constitutes a loop.
Described low boiling working fluid is a pentane, the power pressure that enters the low boiling working fluid steam turbine is 3.2MPa, and when the power pressure after the acting of expanding was 0.85MPa, system's electromotive power output was 3000KW, Rankine cycle efficient is 14%, and the flue-gas temperature that system discharges is 50 ℃.
Adopt device for generating power by waste heat after the first dedusting, promptly earlier the high temperature dust flue gas being entered the carborundum filter-element dust collector purifies, carborundum filter core in the deduster, generally can bear the long-term work temperature about 1000 ℃, high energy bears 1300 ℃ high temperature, and can bear that high temperature is oarse-grained to be washed away, therefore can the direct purification high-temperature flue gas, and do not need to do any preliminary treatment.Dust concentration after the purification is reduced to less than 10mg/Nm
3Become clean flue gas, do not need to handle the problem such as obstruction, deashing of dust.
The course of work of the present utility model: smoke discharging flow 25 * 104Nm3/h in the 120t/h metallurgical furnace 1,800 ℃ of temperature, dust content 30g/Nm3 is discharged by the 4th hole, sneaks into cold wind through water-cooled sliding sleeve 2, enters combustion settling chamber 3 behind the burning CO gas; The effect of combustion settling chamber 3 is: reduce flue gas flow rate, make the big dust particle sedimentation of carrying in the flue gas, and suitably sneak into cold wind, finally burn CO gas, the flue gas that is come out by combustion settling chamber 3 enters deduster 4, and dust concentration is less than 10mg/Nm3 after dedusting.Enter heat exchanger 5 then, temperature is reduced to about 50 ℃, is pressed into aiutage 7 by main air blower 6 and enters atmosphere.Simultaneously, low boiling working fluid drives by working medium pump 11, absorb the heat of fume afterheat carrier earlier in the finned evaporator 8 in being installed on heat exchanger, become saturated vapor, behind pressure regulator valve, the working substance steam acting of in low boiling working fluid steam turbine 9, expanding, and drive threephase generator 10 generatings.The working substance steam of discharging from low boiling working fluid steam turbine 9 is condensed into saturated liquid by aluminium fin-plate type condenser 13, sends in the finned evaporator 8 circulation of a beginning new round after by working medium pump 11 worker quality liquid being pressurizeed again.The electric energy that system sends is a three-phase alternating current, and rated voltage is 380V, can incorporate electrical network in the factory into through after the pressure regulation, or directly gives consumer and use.
The maximum characteristics of this equipment are the waste heats that metallurgical furnace flue gas is reclaimed in cogeneration after the first dedusting of employing.With 120t/h steel-making metallurgical furnace dust collecting process is example, and dedusting relatively is described as follows after the utility model flow process and the conventional UTILIZATION OF VESIDUAL HEAT IN:
Annotate: work per year and calculated in 330th.
This shows, the heat energy that the utility model can reclaim in the flue gas to greatest extent is converted into the high-grade electric energy, heat exchanger need not unload ash, deashing, defeated grey facility, prolonged the service life of equipment, can reduce simultaneously the exhaust temperature of flue gas, improve dust collection capacity, and not influence the stable and continuous of electric furnace steel making production, can also obtain good dust removing effects, the dust concentration of discharging is less than 10mg/Nm
3Plant investment is low, operation energy consumption is low, and environment protecting is good.
Claims (4)
1. the high ash-laden gas cogeneration of metallurgical furnace high temperature isolated plant, comprise the metallurgical furnace, air-introduced machine, the aiutage that connect successively by pipeline, it is characterized in that: be connected with hot precipitator, heat exchanger in turn by pipeline between described metallurgical furnace and the air-introduced machine.
2. the high ash-laden gas cogeneration of metallurgical furnace high temperature according to claim 1 isolated plant is characterized in that: be provided with the carborundum filter core in the described hot precipitator.
3. the high ash-laden gas cogeneration of metallurgical furnace high temperature according to claim 1 isolated plant, it is characterized in that: in the described heat exchanger finned evaporator is installed, the entrance point of finned evaporator is connected with the high-pressure outlet end of working medium circulating pump, the port of export of finned evaporator is connected with the upper flange interface of steam turbine behind pipeline, the bottom interface of low boiling working fluid steam turbine is connected by the air inlet of pipeline with aluminium fin-plate type condenser, the liquid phase outlet of aluminium fin-plate type condenser is connected with the low pressure inlet end of working medium circulating pump by pipeline, the low boiling working fluid steam turbine is connected with threephase generator, an end flange interface of aluminium fin-plate type condenser is connected with water pump, another end of aluminium fin-plate type condenser connects cooling tower, cooling tower is connected with water pump, constitutes a loop.
4. the high ash-laden gas cogeneration of metallurgical furnace high temperature according to claim 3 isolated plant is characterized in that: adopting pentane is the circulation organic working medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205633385U CN201837261U (en) | 2010-10-12 | 2010-10-12 | Special device for power generation by using high-temperature high-dust-content flue gas waste heat in metallurgical furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205633385U CN201837261U (en) | 2010-10-12 | 2010-10-12 | Special device for power generation by using high-temperature high-dust-content flue gas waste heat in metallurgical furnace |
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| CN201837261U true CN201837261U (en) | 2011-05-18 |
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| CN2010205633385U Expired - Fee Related CN201837261U (en) | 2010-10-12 | 2010-10-12 | Special device for power generation by using high-temperature high-dust-content flue gas waste heat in metallurgical furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287245A (en) * | 2011-07-26 | 2011-12-21 | 北京世纪源博科技有限责任公司 | Aluminum electrolysis cell flue gas waste heat generation system with flue gas separation device |
| WO2018097780A1 (en) * | 2016-11-25 | 2018-05-31 | Scania Cv Ab | A whr system including an aluminium condenser |
-
2010
- 2010-10-12 CN CN2010205633385U patent/CN201837261U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287245A (en) * | 2011-07-26 | 2011-12-21 | 北京世纪源博科技有限责任公司 | Aluminum electrolysis cell flue gas waste heat generation system with flue gas separation device |
| WO2018097780A1 (en) * | 2016-11-25 | 2018-05-31 | Scania Cv Ab | A whr system including an aluminium condenser |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110518 Termination date: 20141012 |
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| EXPY | Termination of patent right or utility model |